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Ultra high molecular weight polyethylene liner installation method

Aug 16, 2019

Generally, when installing the lining plate, the longest side of the lining plate is installed in the vertical direction, and if the plate is thin (less than 20 mm), the vertical side can be overlapped. For thicker liners, the edges should be cut to 45 degrees. In this way, the allowable length is varied and a smooth plastic plane is formed in the silo to facilitate the flow of material. The side of the board laid along the direction of material flow can be fully met by docking.


 

 

Fixing the lining technology on the concrete structure When installing the concrete structure storage tank, hopper, etc., especially for the old storage tank or hopper, it is necessary to check the strength of the concrete structure (the thickness and firmness of the cement layer is necessary). The thickness and structure of the concrete have a direct bearing on the robustness of the mounting liner. According to the results of the check, select the appropriate fastening material.

 

Generally, it is connected by special expansion bolts. The expansion bolts must be placed on the hard cement layer without cracks and holes (using plastic anchors in the case where the above conditions are not available, and the lining can be firmly fixed). The distance between the fixing bolts depends on the thickness of the lining and the operating conditions. Fixed linings generally use special countersunk steel bolts with locking (anti-loose) nuts as follows.

 

An impact screw with a washer that impacts the threaded screw into the steel plate, thus eliminating the need for a nut. In both cases, it takes a lot of drilling work, which means increased labor and tool wear and tear, and the installation cost is higher. A more convenient method of fixing the lining is to weld the studs on the steel plates of the silo and chute. In order to ensure the quality of the weld and prevent the high temperature of the welding production on the plastic plate.

 

The porcelain ring is used to protect the arc atmosphere welding, the arc is concentrated, the weldment is slowly cooled down, and a neat standard weld is formed. Since the expansion coefficient of the liner is 2 x 10 -4 / ° C, the fixed form of the liner must be considered for free expansion or contraction in the case of large changes in handling or ambient temperature. Any method of fixing should be designed to facilitate the flow of bulk material and the head of the screw is always embedded in the liner.